Tectonic tilting and coseismic subsidence along the yoro fault system revealed from upper holocene sequence in the Nobi plain, central Japan

Yuichi Niwa, Toshihiko Sugai, Ken Ichi Yasue, Yoko Saito-Kokubu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Analyses of 24 shallow cores obtained from the present flood plain and the delta plain area of the Nobi plain, on the footwall side of the Yoro fault, suggest river channel change to west and temporal sea-level rise. The cores are represented by delta system and overlying fluvial system. Stacking patterns of the sedimentary units in the cross sections from the northern flood plain and 14C ages indicate the possibility that river channel change to the west occurred at ca. 2300 cal BE High EC, and brackish-marine diatom species identified in back swamp deposits in the cross section from the southern delta plain suggest temporal relative sea-level rise occurred at 1600 to 2700 cal BR There is synchronism of the above-mentioned channel change and temporal sea-level rise events. It is probably that the cause of these events is tectonic tilting and coseismic subsidence by faulting at Yoro fault.

Original languageEnglish
Pages (from-to)201-206
Number of pages6
JournalChikei/Transactions, Japanese Geomorphological Union
Volume32
Issue number2
Publication statusPublished - 2011 Apr 25

Keywords

  • 14 ages
  • Coseismic subsidence
  • Nobi Plain
  • Tectonic tilting
  • Yoro fault system

ASJC Scopus subject areas

  • Earth-Surface Processes

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